What does the yellow warning mean?

The yellow warning represents eleven disasters, such as strong typhoon, rainstorm, high temperature, cold wave, fog, thunderstorm and gale, gale, sandstorm, hail, blizzard and road icing.

First, yellow rainstorm warning signal classification

The rainfall will reach more than 50 mm within 6 hours, or it has reached more than 50 mm, which may or may have affected and the rainfall may continue.

Second, the division standard

1. Heavy rain is rain with high precipitation intensity. It is raining cats and dogs. Generally, it refers to the precipitation with hourly rainfall greater than16mm, or12h continuous rainfall greater than 30mm, or 24h continuous rainfall greater than 50mm.

2. According to China's meteorological regulations, the rain with a precipitation of more than 50 mm in 24 hours is called "rainstorm". According to its precipitation intensity, it is divided into three grades, that is, the 24-hour precipitation of 50 ~ 99.9 mm is called "rainstorm", and the rainfall below 100 ~ 200 mm is called "heavy rainstorm"; More than 200 mm is called "rainstorm".

Due to the different characteristics of precipitation and topography, the standards of rainstorm and flood are different in different places. Rainstorm is a kind of disastrous weather, which often causes floods and serious soil erosion, leading to major economic losses, such as engineering accidents, dike breaches and crop flooding. Especially for some low-lying and closed terrain areas, rainwater can not be discharged quickly, resulting in farmland water accumulation and soil water supersaturation, which will cause more disasters.

3. The world's largest rainstorm occurred in reunion island, South Indian Ocean, with a 24-hour precipitation of1.870mm. The largest rainstorm occurred in Xinliao, Taiwan Province Province, with a 24-hour precipitation of1.672mm, all caused by tropical cyclone activities.

China is one of the countries with the most rainstorms in the world, and almost all provinces (cities, districts) have rainstorms. Mainly concentrated in the second half of the year. The regional distribution of rainstorm days is obviously more in the south and less in the north; There are many coastal areas and few inland areas; There are many windward slopes and few leeward slopes.

The annual rainstorm days in mountainous areas of Taiwan Province Province are more than 16 days, Dongxing, Yangjiang, Shanwei and some coastal areas of South China are more than 10 days, and the average in northwest China is less than 1 day.

Third, preventive measures.

1. In low-lying residential areas, measures of "small enclosure" can be taken according to local conditions, such as building fences, placing water baffles at the gate, and configuring small pumps.

2, don't litter, sundry, etc. Enter the sewer to prevent blockage, leading to flooding during the rainstorm.

3. Power sockets, switches, etc. Residential buildings on the ground floor should be moved to a safe place above the ground 1 m. Once the outdoor water overflows into the house, cut off the power supply in time to prevent electric shock from hurting people.

4. Pay attention to observation when walking in stagnant water to prevent falling into manholes or pits or holes.

5, the river is an important drainage channel in the city, are not allowed to dump garbage and waste at will, in case of siltation.

6. Pay attention to the leakage of rain in the house.

Extended data:

The rainstorm warning signal is divided into four levels, which are represented by blue, yellow, orange and red respectively. On the mainland, the red rainstorm warning signal is the highest level; There are three grades in Hong Kong, and the black rainstorm warning signal is the highest grade, indicating that the rainfall in some areas in the past three hours has reached 100 mm or more, and the rain may continue.

The competent meteorological department of the State Council is responsible for the issuance, cancellation and dissemination of national early warning signals. The local competent meteorological departments at all levels shall be responsible for the administration of the release, cancellation and dissemination of early warning signals within their respective administrative areas. Other relevant departments shall, in accordance with their duties, cooperate with the competent meteorological departments in the release and dissemination of early warning signals.

Issuing rainstorm warning signals is helpful to improve early warning and reduce people's lives and property losses.

Baidu Encyclopedia-Yellow Warning Signal

Baidu Encyclopedia-Yellow rainstorm warning signal